Attachment-plug.



R. A. SCHOENBERG.

ATTACHMENT PLUG. APPLICATION-FILED APR. 22, :91s.

1,224,505. Patented May 1, 1917.

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i K bears against the other `and-using what may vSfr RALPH a. SCHOENBERG, or Yoan, n'. Y.

- ,ATTACHMENT-PLUG.

fihzz'esosi -f istat@ Of New York, have invented a new and useful Attachment-Plug, of which the following is a specification.

`The'mainobject of my invent-ion is to provide an attachment plug which is very light and very cheap and which is at the same time very eflicient.

A feature of myinveiition consists in eliminating all of what has heretofore constituted the body of the attachment plug be termed a mere shell which maylhave an insulating lining it desired.

@ther features relate to structural ini- ,l y r uvements.

other features will be pointed out be' 1 w, Q`lln the drawings:

Figure 1 is a central longitudinal section off a' plug embodying my invention;

Fig. 2 is a top plan of the same;

Fig. 3 is a bottom plan of the saine; and

Figs. 4 and 5 are sectional views of modications.

Metal shell A llange a at its upper end annular flange a at its lower end and a cir- It is also threaded at a3 and has -a pocked a* perforated at a for the end of lead wire B, which end is soldered to the shell at theoutside of the latter, that is, in said pocket, this arrangement providing for soldering from the outside and at the saine time avoiding interfering with the screwing fo'f'- the plug into place.

A fiber cap or cover D has a port d for passage of lead wires B and B and has a yflange resting'on lange a. Exterior insulation E in the form of a ring is held between a2 and insulating ring F, the latter and flange d being clamped to flange a by metal clamping ring Gr. n

An inner perforated insulating fiber washer H rests on one side of flange a. and an outer perforated insulating fiber washer side of flange c and these two washers are clamped together and to flange a by tubular rivet M to which hasan outturned annular and an inturned is soldered the bare end of wire B, rivet M a center contact terminal which is sup- 'ported fa shers and flange af.. An insulating washer may be used in the opening of flange a to Specification of Letters Patent.

Patented May l, igll.,

Application led April 22, 1916. Serialllo. `9&980,

vthe shell if such use is desirable, this lining H. so

being held between cover ,D and washer It will be clear that the usual core or body has been entirely dispensed with and that l use a mere shell which supports all the parts.

ln Fig. l l show a modification as to the center contact structure in which washers H. K and N have registering perforations forming a port R for the end ll of lead wire li. which end is bent around the head of center contact rivet .M which has prongs which are clenched to hold the washers to each other and to flange a.

In Fig. 5 l use a tubular rivet M2 which is interioi'ly threaded to receive screw S, the end of wire B being clamped between. rivet M2 and the head s of screw S.

That I claim is:

1. An attachment plug comprising a screw shell body, the inside of the shell forming the wall of an open chamber, said shell having a perforation in its sidewall and serv ing as a terminal; a center contact mounted on` but insulated from, said shell; a cap for and being permanently connected to the shell at the outside of the latter, and the other being permanently connected to said center Contact.

2. An attachment plug having a screw shell body, the inside of which is a hollow chamber, said shell having a perforation in its wall substantially below the top of the shell; a cap with a perforation@ conducting means to hold said cap to saidshell; a lead wire passing through the perforation of said cap and through the perforation of said. shell and connected mechanically to said shell at the outside of the latter; and exterior insulation for said shell between said conducting means and the point of conf nection of said lead wire and said shell.

3. An attachment plug comprising a hollow screw shell, the' inside of which forms the wall of a hollow chamber, said shell having an inturned flange at one end and another flange at the other end and having a perforation; a center Contact mounted on, but insulated from, said iiitu'rned flange; a cap with a port; mea-ns to attach said cap to said other llaiige: a lead wire passing through said port and through said chamber -wires extending through said port, one eX- tending through the perforation in the shell side thereof but and 'through said perforation and being me chanically connected to'said` shell at the -Within the outer. eircimfe'ij ence of the threaded portion thereofymlv fil second lead 'Wire passing through'said foration and through said chamber and'bii ing connected to said center eontactgl e 4. An attachment plug comprising a screw shell body, the inside of the shell forming the Wall of an open chamber, saidscrew shell serving as a terminal g, a center contact` outer circumference of the threaded porl.. mayor tin-151x111 'ajsecond lead' Wire, passing'tlirough gai 'andfthroighsaid' chamber land l ted 'sidjcenter contact; f 4- 'a'ttachgnetplugfcomprising a screw shell body, thinsi e 4of f which A is a' hollowchamber; },`ziidl shell haying; an" linturned flange; a center contact; insulating mate- L.ri'a'l connected with said center vcontact and "supported by said iiange; anda lead-wire passing through said chamber vand through ed to said'contact 'at the outside vof lthedevice.

`said insulating material and`being connect- 6. An attachment comprising a shell i With a Han-ge; a'formedu'p cap of'ins'ulating sheet material; and means to hold said cap to said flange. v

v RALPHA. `SQHOENBERGr. 

